My 18 yr old daughter's boyfriend is turning 18 in 2 months. His mother and step-dad have been abusive to him ever since they got together 14-15 years ago. They play the other youngers kids against him. There's alot there and he wouldn't let me call DHS because he didn't want the younger children to go to foster care.

He wants us to come get him in Utah, where the dad moved them in December (the boy still has his driver's license from another state). His birthday week, is when he wants us to come and take him back with us. He wants to finish highschool here and then will be joining the army.

His step-dad has been telling him that if he leaves, then he will have to pay for past medical expenses incurred when he was a minor. Step-dad says he won't pay it any longer if the boy leaves. He's also told him that just because he's 18 doesn't mean he's an adult and can leave their home. That if he's still in school then he's still a minor. If he comes here, he will be living in our home, going to the local school and be just like one of the family. Is there any truth to this step-dad's threats?